Twin-boom adjustable excavator and dredge.



C. D. CAMPBELL.

TWIN BOOM ADJUSTABLE BXGAVATOR AND DREDGB.

APPLICATION FILED MAR. 23, 1908. 926,096. Patented June 29, 1909.

fm: nomas urns co.. vusnmcron. u. c.

G. D. CAMPBELL.

TWIN BOOM ADJ USTABLB EXGAVATOR AND DREDGE.

APPLICATION FILED MAR. 23, 1908. 926,096. Patented June 29, 1909. 2 SHEETS-SHEET 2.

InvenToY Cien D. Cam be/ Bg l I Svv His Aorneq.

OLELL I). CAMPBELL, O

PATENT FFICF..

F LINCOLN, NEBRASKA.

TWIN-BOOIVI ADJUSTABLE EXCAVATOR AND DREDGE.

Application filed March 23 To all whom it may concern:

Be it known that I, CLnLL I). CAMPBELL, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented an Improved Twin-Boom Adjustable Excavator and Dredge, of which the following is a specification suiiiciently clear to enable those Skilled in the art to which it appertains to make and use the same.

My invention relates to an improved twin boom adjustable excavator and dredge. Its object is :-1, the production of a machine which will excavate Afrom above from the level of and from below the level of the machine in any direction and at any desired slope; 2, the production of a machine which will excavate in any direction at any desired grade, either from above or below and which will grade up, fill in, level olf, or load cars in any direction from the machine; 3, the production of a machine which will dig trenches, or ditches with sides any slope, or build grades or dredge on any slope or on a level; t, the production of a machine which from one track will cut away an embankment in front and level olf for its own track and which may be reversed and will excavate below the level of its track in the rear, either in dry soil or below the water level. These purposes are attained in my invention by certain novel combinations of materials, parts and construction which will be hereinafter described and claimed.

My invention is illustrated in the accompanying drawings.

Figure l, is a side view of my machine. Fig. 2 is a plan view of the upper platform or turntable car. Fig. 3 is a plan view of the center platform, or laterally moving car. Fig. l is a plan view of the lower car or track on ties showing sloping sides and bot` tom ofgrade excavation. Fig. shows a cross section of my machine with towers on either side.

Similar letters refer to similar parts throughout the several views.

I make my machine with twin booms, one above the other, each boom of uniform width throughout and tapering in depth each way from axis, or bearing shaft. I make the corners of each boom of angle steel with the exception of the lower forward end of the bottom boom and the upper forward end of Speecation of Letters Patent.

Patented June 29, 1909.

, 1908. Serial No. 423,075.

the top boom which corners I make of channel steel, as Fig. l so as to form parallel tracks and guides facing each other to hold and carry the scraper and plow wheels, (Zw Fig. 5 I make the booms of metal lattice work, a", Fig. l preferably, though they may be niade with sheet metal if desired, I lattice outside the channel steel so as to leave the wheel tracks free. I strengthen each boom by metal plates on each side at its greatest depth, au l and at its ends, c and (613, Fig. l I make the booms each rectangular in cross-section as shown atcZT and (ZS, Fig. 5. I suspend each boom at approximately one third its length on a horizontal axis, or shaft, (Z and (Z1, Fig. l l, placing one boom directly above the other so as to rock vertically as shown by the dotted lines in Fig. l, with barings on its shaft or axle. l make the. lower boom axle stationary boxing it into the pier or tower on either side, d, Fig. v I make the upper boom axle so that it o may be moved in the are of a circle whose center of radiation is the lower boom shaft for which purpose I place a pinion wheel, t (Z2, Fig. l on each end of the upper boom shaft on the curved cog' track, c Figs. l aml 5 which cog track is built into the pier, on each side of the boom, and braced to the pier and to the turntable c, the piers being made with an oil'set to receive the cog track and its braces. I further equip the upper boom shaft with the worin wheel d, Figs. l and 5 and the worin c2, Fig. l and the worm shaft ZG its bevel gear and sprocket wheel di and (Z5 Fig. 5 and chain connected with sprocket an( power. On the turn table c I build on each side of and supporting the booms a pier or tower, d", Fig. 5 7 which piers I make with angle metal corners, and latticed or sheet metal sides, latticed preferred, and connect the piers together at the top with two eyecams between which eyebeams I place a pulley for convenience in assembling the parts. To the longer, or working, ends of the twin booms I attach by the hinge joints, b, Fig. l the grade regulating frame, or car, a?, Fig. l which I make with parallel channel metal (steel preferred) tracks above and below connected at the outer end by parallel half circles of channel shaped metal all rigidly connected and braced together. At the axis of the half circles I place horizontally through said trame, or car, an axle, or shaft, F 77 Fig. 177 on each end of which axle I place the cable carrying wheels Fig.V

l 77. 'Ilo the shorter ends ot the twin booms I likewise attach by hinge joints Z) 77 the ballast carrying trame, or car, a3, Fig. 177 in which an engine may be carried it' desired. I make the ballast carrying trame, or car, ot any suitable material, metal preferred, building it well braced and rigid. 'Io the upperand outer sides of the ballast carrying trame I attach the upper sheave wheels, b2, Fig. 177 ot a block and tackle arrangement, the lower sheave wheels h1 Fig. 177 otl which I attach to the sides of the extended end oit the turn table platform, or ear c 77 as shown in Fig. 1, connecting the cable ot the block and tackle arrangement to the power operated drum, 7 b5, Fig. 177, from wnich cable 2210 77 goes under the double sheave wheel 22177 then up and over the sheave wheel b2 77 then down and under the double sheave wheel 22177, then back up and its end attached to casing of sheave wheel i b2 77. I make the scraperl and plow moving cable, (610, Fig. 177 either ot chain, or wire cable, wire cable preferred. I attach one end of the cable to the power operated drum, 5S Fig. 177 passing the cable up over the sheave wheel Lt, Fig. 1 77 attach the cable to the plow, the cable passes over the cable carrying wheels al 77 and is attached to the scraper a5 77 the cable then passes around the cable carrying wheels at, Fig. 177 and ov r cable carrying' wheel a 77 above and back to and over cable sheave wheel b3 77 and down to the power operated drum 67,77 all shown in Fig. 1. I make my scraper, a5 77 and plow al 77 1, with rigid supports otset inwardly and carried by an axle above in Jfront and in the rear ot each scraper and plow, on wheels (Zw F ig. 5 77 which wheels run in the channel tracks, as Fig. 5 77. I make my plow interchangeable with a scraper for use in soft soils.

I mount my machine upon ordinary, power operated cars of steel construction preferred, placing my machine, together with the drums and engine, or other power, upon the upper car c Fig. 177 though the engine may be mounted upon the ballast carrying iframe or car it desired, the car c 77 revolving in a complete circle on track 0S on the second car c1 Fig. 177 and the second car c1, Fig. 177 moving' laterally back and forth across the excavation on tracks c5 on the lower car, c2, Fig. 177. 'Ihe lower car 02, Fig. 177 moving forward and back on the tracks c7, Fig. a.

In use I place my machine in the position shown in Fig. 177 and operate the same by any suitable power in the following manner: I move the scraper and plow around progress of the work.

the grade regulating frame or car to positions above the grade regulating `car and upper' boom by means of the scraper and plow cable n10 77 and power operated drum 7)? 77, then lower the longer ends of the twin booms until the grade regulating frame, or car, reaches the point at which the excavation is desired by means ot' the block and tackle arrangement, 1 and h2 77 and the cable used thereon, 61077 and the drum, i (7)577. I then by ieans of the drum 5877 and the. plow and scraper cable @1077 move the plow and scraper around and under the grade regulating :trame and lower boom plowing the soil and [illing the scraper, then elevate the grade regulating frame and the long ends of the twin booms to the height desired by the drum 5577 and the block and tackle arrangement. I then revolve the turntable car c7 moving the car c1 77 laterally on track c5, until the grade regulating car is directly over the place where the dirt is to e deposited, then by means ot' the drum (7)7 77 and cable @1077 move the loaded scraper out around the end of the grade regulating frame until the scraper assumes a vertical position and the dirt is deposited and the scraper and plow again assume a position above the grade regulating frame and the upper boem. This process is repeated the position et the turn table car c being moved laterally on car 0177 as the excavating progresses and circumstances require and car 0777 being moved forward and backward as most convenient during i My machine so used enables the bottom of the excavation to be made on a level, the grade regulating frame having' its lower side horizontal at any elevation or depression it may assume owing to .the novel construction of my machine.

lllhen I desire to make the excavation on a slope, as for the sides ot a cut I move the axle ot the upper twin boom by the mechanism provided therefor until the lower side of the grade regulating :trame assumes the incline., or decline desired and proceed as before with the excavating, the novel construction ot my machine then holding the grade regulating trame at the same angle at all elevations and depressions. Moving the axle ot the upper boom forward causes the grade regulating frame to decline and slope forward, moving the axle backward causes the grade regulating frame to incline and slope upward.

The mode of operating my machine is exceedingly simple and its utility is at once apparent. Besides doing all kinds of eXcavating it will build a grade or dike, cut down a bank in :front and make a fill in the rear, excavate at the sides and make a till in trent, build its own grade and it may be used as a derrick to pick up sections of its own track from the rear and swing them into position in front, having leveled off its grade by passing the scraper back and forth over same. It may be also used to handle and operate a pile driver and for many other useful purposes.

I am aware that a turntable car mounted to rotate on a second car, a second car mounted to move transversely on a third car, a third car mounted on tracks are not new and I do not broadly claim same.

Vliat I claim as my invention and desire to secure by Letters Patent is l. `In an excavating machine, or similar structure, in combination, a pair of twin booms, said booms being pivoted one above the other at approximately one third their length so as to have a vertical rocking motion and a ballast car, pivotal-ly attached to each of said booms.

2. In an excavating machine, or similar structure, the combination of a regulating frame or car and a pair of twin booms pivotally connected with each other and excavating appliances mounted on the regulating frame and booms.

3. In an excavating machine or similar structure, in combination a pair of independent, parallel, moving twin booms, a ballast car pivotally attached to said twin booms, a grade regulating frame pivotally attached to said twin booms and power mechanism for `operating said booms by raising and lowering said ballast car.

4. In a machine of the type described, in combination, a pair of independent, parallel, moving twin booms, a ballast car which is pivotally attached to each of said twin booms, a grade regulating frame which is pivotally attached to each of said booms and excavating appliances mounted upon said grade regulating frame and booms.

5. In a machine of the type described, a pair of independent, parallel, moving twin booms, a ballast car, which is pivotally mounted to each of said twin booms, a. grade regulating frame, which is pivotally attached to each of said booms, and mechanism for operating said booms by raising and lowering said ballast car, in combination with excavating appliances mounted on said grade regulating' frame and booms.

G. In an excavating machine, or similar structure, the combination of a grade regulating frame or car, a. pair of twin booms, each of said booms being pivotally connected with said regulating frame, excavating appliances mounted on said regulating frame and booms and mechanism for longitudinally adjusting one of said booms independently.

7. In an excavating machine, or similar structure, in combination, a pair of independent, parallel, inoviiig twin booms, which are pivotally attached to each other, a grade regulating frame which is pivotal-ly attached to each of said booms, mechanism for shifting one of said booms to change the slope of said grade regulating frame, and excavating appliances which are mounted on said frame and booms.

8. In a machine of the type described, a pair of independent, parallel, moving twin booms which are pivotally attached to each other, a grade regulating frame which is pivot-ally att-ached to each of said booms, mechanism for shifting one of said booms to longitudinally tilt said regulating frame and excavating appliances which are mounted on said frame and booms, in combination with mechanism for operating said excavating appliaiices.

9. In a machine of the type described, iii combination, a pair of parallel twin booms, said booms being pivoted one above the other, a grade regulating frame, said frame being pivotally attached to each of said booms, mechanism for shifting one of said booms, a ballast car, said car being pivotally attached to each of said booms, and excavating appliances mounted on said grade regulating frame and booms. l

In testimony whereof I have signed my name to this specification at Lincoln, Nebraska in the presence of two subscribing witnesses.

CLELL D. CAMPBELL. Vitnesses T. F. A. WILLIAMS, FREDERICK SHEPHERD. 

